Door lock



A. E. CHESLER Sept. 15, 1953 DOOR LOCK 2 Sheets-Sheetl l Filed April 20 1950 Sept 15, 1953 A. E. CHESLER 2,651,934

DOOR LOCK Filed April 20. 1950 2 Sheets-5h69* 2 'f1-@4. ffii ATTORNEYS Patented Sept. 15, 1953 UNITED STATES PATENT OFFICE DOOR LOCK Abraham E. Chesler, Woodmere, N. Y. Application April 20, 1950, Serial No. 157,065

(Cl. 'Y0-146) 9 Claims.

This invention relates to door locks, more particularly of the cylinder lock type.

It is among the objects of the invention to provide a cylinder type doorA lock of simple, inexpensive and rugged construction utilizing but few parts none of which are delicate or likely to become out of order and which may readily be assembled to a door with but the exercise of ordinary skill, and which in addition to the advantages of the conventional cylinder lock, incorporates a turn bolt foi` locking or unlocking a spring biased bolt type-latch from the inside independently of the key operation from the outside.

Another object is to provide a door latch of the type which utilizes the compact cylinder of a conventional cylinder lock as the agency for locking or unlocking from one side of the door a conventional spring 'biased bolt type latch normally opened by the knob shaft without in any way interfering with the locking or unlocking of the latch from the other side of the door by a turn bolt.

Another object is to provide a door lock of the above type which though it dispenses with the need for a dead bolt, rprovides the same security against jimmying open `the door as such dead bolt provides.

Another object is to provide a door lock of the above type which incorporates a compact ilat transmission unit of the type shown in Patent No. 2,303,790 which is easily axed to the door for establishing a driving connection between a cylinder lock and a spring biased bolt type latch.

In the accompanying drawings in which is shown one of various possible embodiments of the several features of the invention.

Fig. 1 is a fragmentary longitudinal sectional view of a door with the lock installed,

Fig. 2 is a longitudinal sectional view taken along line 2 2 of Fig. 1 showing the lock in open position,

Fig. 3 is a view similar to Fig. 2 taken along line 3 3 of Fig. 1,

Fig. 4 is a View similar to Fig. 2 showing the lock in closed position,

Fig. 5 is a longitudinal sectional View on a larger scale taken along line 5 5 of Fig. 1,

Fig. 6 is a fragmentary perspective View of a door with the lock installed and with parts broken away, and

Fig. 7 is a longitudinal sectional view taken along line I I of Fig. 5.

Referring now to Fig. 1 of the drawings, a cylinder lock II, the vdetails of which need :not

be shown or described as they are conventional, extends through a corresponding hole I2 in the door I3, with the rim I4 of the lock resting against a corresponding depressed flange I5 of a collar I 6 about said lock II.

Although the cylinder lock II may be secured in place in any suitable manner, preferably a substantially cup-shaped disc I'I whose outturned rim I8 overlaps the inner face of the door is positioned in hole I 2 and serves as the anchor for the cylinder II and the collar IS. A plurality of screws 2I extend through the disc Il and are threaded into lugs 22 of the cylinder lock casing, drawing the latter tight against the door and collar I 3 thereby securely retaining the cylinder lock II and collar I6 in place.

Conventional door knobs 25 are mounted respectively on the extremities of a shaft 25 which is desirably substantially square in cross section and extends through the rotatable hub 2'I of a spring biased bolt type latch 28 which is positioned in a horizontal bore` 29 in the door. Shaft 25 serves to operate the spring biased bolt 3i?, the head 3l of which protrudes through the usual aperture 33 in the face plate 32 which trims the side edge 33 of the door and is secured thereto by screws 34.

Although the latch 28 may be of any suitable conventional type, in the embodiment herein shown to illustrate the invention, as shown in Fig. 6, it desirably comprises a pair of complemen-tary plates 36 and 3l having inwardly turned flanges 38 at the upper and lower edges thereof near the front end of the plates 36, 37 and also having inwardly turned flanges 39 at the rear edges thereof.

Thus, when the plates 33, 3'! are joined together by meansof a screw 4I extending through a hole in one of said plates, illustratively plate 31, and threaded into a boss 42 desirably cast integral with the other plate 36, the plates will be securely retained together with the adjacent edges of said flanges in abutment. A casing will be formed in which the mechanism of the latch is mounted, the face plate 32 being secured to the front of said casing by means of a tongue 43 stuck out from the face plate and defining the aperture 33 therein, and clamped against plate 36 as by a rivet 44.

As shown in Fig. 5, the latch bolt 33 desirably comprises a stem 45 having the head 3| desirably formed integral with one end thereof. Stem 45 desirably has an elongated slot 4G therein to accommodate a tensed coil spring Il? compressed between the head 3| and the boss 42,

normally to urge the latch bolt to its outermost position.

The rear end of the stem 45 has a yoke con formation desirably formed integral therewith, the legs 48 of which straddle the hub 2l which is journalled in suitable bearing opening l in plates 3G and 31. Each of the legs 48 desirably has laterally extending iingers 52, 53 Which coct respectively with the Wings 54, 55 desirably formed 'integral 'with 1hub 2bn/hereby upon rotation of said hub 121 by shaft-25 inA eithery a clockwise or counterclockwise direction, as shown in Fig. 5, the latch bolt 3() Will be retracted against the tension of coil spring tl.

Means are provided to lock the shaft"`25 `to prevent rotation thereof. Suchvmeansrdesirably comprises a transmission frornthe cylinder lock Il to the shaft 25 which is disposed between the inner face 5S of the door I3 and an.escutcheon plate 51 which is attached to said door by screws 58,. the. escutcheonv plate, desirably.VV havingI a,rim ,59 .pressed againstQthe. door to provide aease'. Iii. The-transmission. which, is similar to...that ushownin PatentNo..2,3(l3 ,"7190; .dated December 1,

1942', is desirably built as. a fiat unit and .com-,-

prises a. steel transmissionplatelz inthe .form of atray, ,restingat its .upper and lower pressed Y. ont .portions 53. .and t.Sli .respectively .against the .inner face of .escutcheon plate 51Kv with; the .intervening length fof .plate 62 .beingspaced fromv the,

., escutcheon plate'. .The plate 162 is positioned rwith its rim S 5, Apressingagainst theirmer face `ofthe door and straddled yby therim 59 ofthe -escutoheon plate and` is vdesirably secured in'place bythe samescrew's which mount theescntcheonlplate. v

to the door, thescrews passing'through openings in portions F53 and 54.

The..conventionalperating bar '66 of. vtheeylinder lock ,Il passes through .anopening Elin disc l1 into4 a. transverse slot 58 rin one vend, .of ahub E9. havingA a. bearing ,mount .infthe transmission plate 62, which hub .69 ,mounts a gearsegment .1i on its other end. A,hub l 2,.through whicht-he shank .13 of a turnboltIM mountedwonthe es- `cutcheon plate 51 extends, is likewise mounted for rotary ymovement on the transmission plate Hub 12 mounts a gear segmentfl affixed thereto andy lyingin thesame `planeas thegear segment ll, for meshingrtherewith. Desirably, gear segment .ll has yonly one.I pair--ofroundedteeth i6 extending at an .angle of'.approximately-66 with respecttoeach.other.. .Gear.segment desirably has a singlegear tooth .lladapted to .mesh between the two teeth 16 lof gear l-segment4 il Whenthe latter .is .turned,.so.that. byv operating the cylinder lock Il by its key ||,.gear segment 'H will drive the gearsegment d'5v and rotate the turnbolt 14.

As shown in Figs. 1., Zand 4 a .locking plate .8!

isslidably mounted on-said transmission'plate S2 so that it mayreciprocaterthereomby means .ofthe inwardly extending iiangesl 82 .of transversely aligned,v outstruck tongues` 3 which straddlethe lateralfiedges ,84 of-said'loeking plate BI. The bottom portion .S5-'ofthe lockingplate 8l has a central longitudinal slotfli therethrough 1 With; ian -enlargedsuhstantially fcircular opening 8'5 at the lower end thereon- Slotti is longitudinally aligned with an opening fin the transmission plate .throughsvvhiehy 'shaftY 25extends.

. Slot 86 is onlyslightly greaterl inwidth than that of vshaft sothatxwhenvthe outturned strengthening flanges $39 `ofithe-wlateral edges of the-slot straddlethe.shaft,.as;shown lin Fig.4, the-latter will be restrained againstfrotation` The upper portion of locking plate i!! which extends parallel to transmission plate 52 is slightly spaced therefrom by reason of the transn verse bend 9| in the locking plate, said upper porn tion extending over gear segment 15 and having an opening 92 therein through which hub "52 extends. A stud 93 affixed to gear segment 'i5 extends through opening 92 which is so conformed that upon rotation of said gear segment 115..; in aicl'ockw-ise direetion'idig. 2); the stud 193. will-move `in an arcuate'lpath irr-opening 92 to abut against shoulder 95 to move the locking Lspiate Bl in its slide bearings 82 to the position .shown in Fig. 4. In this position of the locking "plate 8| the shaft 25 is straddled by the a 9 .of .theslota to prevent rotation of said sh When said gear segment 15 is rotated in a coun- -'terclockwisedirection, the stud will likewise move inanarcuate path in opening 92 to abut against shoulder 96 to move/.the locking plate 8! from the position shownin JEig. 4 to the position shown iriFig 2,whichthe.shaft' 25 coaxial withopem to rotate.

. Desirably afhairpin sprlngf'l'is afxed tothe underface ofthetransmissionplate 62', 'the cross .fromi lateraidisplacementby" struck-'out tongues E25, thereby to assist resiliently in completing the turning of the 'gearfsegment `"15.

-`Desirably afsecond* hairpin spring IGS is also hairpin-spring 91 Whichfextendsover'the `median retained from vertical? *displacement -by the eut- *struck tongue -ifwhichrextends"through said.

median loop.

i The' legsfJHlSi 'oit-theA spring Vr H16- are also anchored by 'tongues-H13* and straddle the hub 69 to lodgeagainst-corresponding'flater hats yl H thereon-in)ordertoposition the- 'hubfte with its transverse slot 68 in horizontal position to ac- 'which extends* horizontally when the cylinder lock is in unlockedr'psition.

' With .theconstruction thus described, the shaft plate. Thus;l thelatclrboltrwill-not'be able to bev operated by'turningfthef'knobs 25 and the door When.;clos'edwithdocking;platey iii-in its 'lower-most position, Y'as'sh1own-"in Fig. 4,- Will be locked.

"However;fas""'the Ilatch"fboltfl) may still be movedin' itscasingj itrwouldbe possible to jimmy open the door by placing a screwdriver'or similar instrument between' the' door'jamb'and'the head operatively connected' .to'lthe' locking plate. il!

in such mannertliat'the stop .arm may be recip- `rocated by.-said .locking plate.; Althoughthe'stop arm 'l I3 may be connectedtoithe lock-ing. plate 8 I in vany suitable mannen inlthe ,embodiment herein. showntollustratetm invention,` theY stop arm I|3 is desirably rigidly aflixedV at one end to the rear face of the locking plate 8| as by welding, and extends outwardly from said rear face at right angles thereto through a vertical slot I I4 in transmission plate 62. the stop arm II3 extends over the upper edges of the plates 36, 31 of the latch 28, and is vertically aligned with transversely aligned notches i I5 in said edges positioned to the rearof lingers 52, 53 of the yoke, the stop arm I I3 being seated in said notches H5 to block the movement of said latch bolt when locking'plate 8| is in locked position with respect to shaft 25 as shown in Fig. 4, and being spaced from said notches I I5 when the plate 8| is in unlocked position as shown f in Figs. l, 5 and 6.

The installation of the lock is effected with ease. The door is equipped with the opening I l0 for the door knob shaft 25, with the opening I2 for the cylinder lock II and with the mortise 29 for the latch 28.

The cylinder lock I I is positioned in opening I2 with its collar I6 therearound and the disc I1 is set in place and screws 2| tightened. The latch 28 is thereupon installed in the mortise 29.

The escutcheon plate 51 is positioned over the transmission plate 62 with hub 12 in registry with opening II9 in plate 51. The shank 13 of the turnbolt 14 is positioned in the bore of said hub 12 and spread at its inner end as at |20 securely to retain the turnbolt in place. The cylinder lock key openingr is turned to vertical position so that the width of the operating bar 63 extends horizontally. The transmission plate 52 and escutcheon plate 51 are screwed to the door in proper relation, with the operating bar 66' entering the slot 60 in hub 69 which is kept horizontal by hairpin spring |06.

The shaft 25 is thereupon passed through the escutcheon plate and the hub 21 of latch 28 and knobs 26 are afxed to the end ofthe shaft to complete the assembly.

rlhe operation will now be briefly summarized.

When the door is to be locked from the outside, the parts are in the position shown in Figs. l, 2, 3, and 6. The operating bar 66 is turned by the key il', which is inserted into the cylinder lock with its teeth upwardly, and` rotates the hub E9 and the gear segment 1I in a counterclockwise direction as shown. in Fig. 2. The gear segment 1I enters into mesh with gear segment 15 and turns the latter in a clockwise direction, as shown in Fig. 2 and as gear segment 15 rotates, the stud 33 thereon will abut against shoulder 95 and move the locking plate 8| downwardly to the position shown in Fig. 4. This will cause the flanges 80 of the slot 8S to straddle shaft 25 to prevent turning thereof and at the same time will move the stop arm H3 into its seat in the notches H5 in plates 35 and 31 of the latch.

In this position, even if a screwdriver or flat member should be inserted between the door jamb and the head 3| of the latch bolt, the latter cannot be moved inwardly as the stop arm I I3, which is to the rear of inwardly turned ngers 52, 53, will block movement of the latch bolt, the latter thereby functioning as a dead bolt.

The spring 91 by its coaction with square flange |00 will be stressed upon rotation of the gear segment 'l5 and will move such gear segment 15 so that it will be in registry With gear segment 1I when the locking plate 8| is in either locked or unlocked position. It is also to be noted that the spring |03 will also be stressed by means of the coaction of the legs |09 thereof with the flats The free end of l removed from the cylinder. herein, the key when thus turned for removal l0:

tion when the lock is either in locked or unlocked position.

The construction of the conventional cylinder lock is such that the key must be rotated through substantially a complete turn before it can be In the embodiment will iirst have rotated the gear segment 1I to the position shown in Fig. 4, in which position its teeth 10 extend generally upward out of the range: of tooth 11 ofthe gear segment 15 and will be` resiliently held in such position by the pressure:

of hairpin spring |06 against flats II I.

It follows, therefore, that the latch 28 may bev locked or unlocked by turning the turnbolt 14`- from the inside through an angle of approxi-- mately 90 degrees without interference from theA cylinder lock I I or the upwardly extending teeth'.

. of the gear segment 1I.

By reason of the construction above described',-

the latch serves the dual function of a latch bolt'- and also functions as a dead bolt and cannot be jimmied open by reason of the fact that the stop l arm locks the latch bolt'in its outermost position.

The compact structure utilized herein permits installation of the lock on even a relatively thin door, as the latch is mortised in the side edge thereof and as the transmission unit which connects the cylinder lock to the latch, is relatively flat and is positioned on the inner face of the l door.

As many changes could be made in the above construction, and many apparently widely different embodiments of this invention could be made without departing from the scope of the claims, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

' latter, a turnbolt and a transmission for operating said locking means both from said cylinder vlock and fronisaid turnbolt, said transmission including a pair of meshing gear segments each having a xed axis, one vof said gear segments being directly driven from said cylinder lock and the other of said gear segments being directly driven from said turnbolt and driving said locking means and the means to prevent movement of said spring biased bolt, the gear segment driven by said cylinder lockdisengaging the gear segment driving said locking means when the latter is in locked and unlocked position whereby said turnbolt may be rotated independently oi said cylinder lock.

2. A door lock comprising a latch having a spring biased bolt, a door knob shaft operating said latch bolt, a cylinder lock, locking means for said shaft to prevent rotation of the latter, said locking means comprising a reciprocable plate movable to locked and unlocked positions with respect to said shaft, said plate having a slot therein adapted to receive said shaft to restrain the latter against rotation, said slot havsagoma i? @EB .feingf `enlargedigestioneadaptedetorreceive'said ssaididonking:meansf'saidslockingrmeans,compris- "sI-rat nf-unlockedaposftiontozpermitifreerota- .ingaazreciprocaleplatemovahe to'slocked v*and i 'tienifitnefshafmrandza ltransmissionifoxnoperzitsurriockedpositionsiwitlrrespectzto said shaft, said ing said locking means from saidicylinderlock, fplatehaving slotzthereimadapted'tc receive said 1:Saidrfgrgnmissionmomprisingf.apairfof:mesh- "zshafti'inidocked .positionotorxrestrain ,the latter `inggeanisegrnentsfeachhaving: a mixed;` axisrione againstrmtation, ssaid; slot :having an enlarged #of rsaidfgeaiil'segments beingzdirectlyxlrivenrfmm Uportioniadapted dzovreceive-,saidshaft in unlocked s'aidrzfcylinder.Llock andfizhe:` otherziJf-. saidgear :postinntonpermit'ireerotation of the latterand `seg-ments@drivingffsaidl:locking meansf the-#gear eazlstopbancarriediby5said-plate andcoacting with Segmentfdriverribxrisaidliindell 100k dsengag-IIOFSaidISDring biased'zboltnin :lockedfpo'sition of said nefthefgeari'segment driving :said'flockingmeans plate topreyentsliding of: said spring v biased Ebolt.

:f1whenathelattenfis'irnlockedandt unlocked PUSi- B. "Rhei: combination .set' forthf'in claim 7 lin 'itiorr'aridrmeanszizrotategthe gearslsegrn'eniz drivwhinlrzsaid lockingz'platefhas an opening Ltherein i-rIgf-'Said flOCkng-IJYIEBAIIS'independrltly :Diusaid deningaai pair: oisnacedshoulder conformations cylinder lock. u:15;.andiiahel gearfsegment driving. said :locking means 3;:fI'he combinationaisett;forthijnrclaim .Z2 in has a stud rigid therewith and-extending. through s'v'vhichsaid ilockingplateihas:apairiiofi-spaced :"said openingpisaidf'stud being-movable in an ar- .shoulder 'L-,corrformationssiand:v theinther-rofisaid i; cuateipatlr and; alternately, abutting against Asaid ifi-gearzfsegments carriles;armembeniadaptedxaltershoulders :to: reciprocate: said :locking plate i: to .znately'toe abut againstz'saidlshoulders' torecipro-i; 20 flocked and` unlockedzpostions.

cate said locking plate .tolockedzandrunlocked 9, A door lock comprising ,.-a;latchfhavinga l positions. fslidablyamonnted #springs biased: bolt; a door z knob if 4,2 The `ffcomlziin'ation':seti forth'xin-.r:claim'I Zin .shaftcperatingfsaidflatchtbolt; arcylinderglock, af. which;gsaidfglgckmgf-platemasranvopening.itherein docking'smeans ffm-said shaft: to prevent rotation dening" afpair'folspacedsishoulderfconformationsaZ of the-lattcrfa iiaurnbolta':transmission for op- .and thewother: ofs'sa-idgeansegments has' aporera-ting saidilnckingfrmeans' both -from Vsaidcylintion projecting into said opening and adapted vider rlool@andz'frorna:said -tnrribo1t,-;saiditransmisfralternately'to 'abutxagainstisaidshouldersito re- -1 sioninciudingmfpair of-.mesh-inggear segments :acipro'catefsaidu lockinggipl'ate #tof lockedfand' @uneavelrAk having? ad xectzaxisgonemf ,said gearyseg- :=1'locked'positions. i f 30` .f ments; being iadireetlynn'lriven'; .from saidcylinder .-,,5, fvAzidnor --rloclcl comprising'r`4 a latch. .having a -floclel andf-the'rother:or-:saidf gear-:segments being Vxrsiidably: mounted spring biased bolt; a; door knob f directlyfdrivenrffrommsaid'@turnbolt,anddriving -slia5ft` opefrating: said jlatch.floolt,:locking:.vrneans said lockingmeans; saidilocking"means, comprisfor said shaft to prevent rotation of the latter. ving'a:y reciprocableplate-movable tovlockedgand s said. ,lockingf-means' icomprisingnf a reciprocableif 35i-unlocked positionsftwithnrespect to said shaft, nplate?rrrova-hle-:toflookedand yunlocked positions said-,plateha-.vingzawslotlftherein adapted to-reewithvrespectato;:saidishaftfsaid :plate shaving*` a -v yceive `said :shaft: in lockediposition to restrain -the f slottherein adapted to receivefsaid shaftin locked latter against rotation, said 'SlOthaVingY an env@positionl to-:restrain :the-latter-against rotation, `I larged;:portioniadapted:toreceive said shaft in said slot"having-an enlarged fportion adapted-tos :40unlocked' position togpermit free rotation 'of the receive saidfishaftfinunlockedfposition to.- perlattenanckiar'stop--barfcarried by said-plateand mit free rotationfiof-:thelatter anda stop bar carcoacting with said springe-biased bolt -in locked f riediby 1said;'pla-teandseoacting with said spring fpositionfofs said-plate-tooprevent sliding .ofI said ...'biersedvd9o1t-.,inl-A lookedyposition of vsaid; plate to .spring biasedbolt.

prevent sliding of said springe-biased--bolt 45 ABRAHAMZE (gl-IHHSIJER` ,The zombinationsetafortlr:ink claim 5 in `swhichsaidalatch.iconrprises az-housing :inv which viRieferences.;Gitcddnthele;of. this Patent saispring:biased'bolt :isi .slidablyT mounted; and `qhgummgm STATESTPATENTS ..saidhousingehas a.-notch therein Apositioned, to

athe rea-r of 7saidspring Abiased-bolt and adapted to 50`l Number Name "Date f ,receivesaid stop banto positionitheslatter inthe awktes Feb', 3 1835 -patnot-'movementof-r saidbolt `to restrain `the .i rms mug Sept 27 1.8 2 -914-,6'70 Pfleghar Mar. 9, 1909 ernovflnentnfithe latter. .92 4,421 .@Blount June 8 1909 ,.7.=,Adoo1 lock .comprising a .latch having, a C 11,547,357 Butterworth July 28', 1925 lock' and the other 'ofsaid'gear segments,v driving 

